• 专利标题:   Preparing layer-by-layer self assembled antibacterial hydrogel filter film useful for removal of antibiotics, comprises preparing mixed aqueous solutions, soaking hydrolyzed surface with carboxy macromolecule film as base film in mixed aqueous solutions, coating, and repeating for multiple times.
  • 专利号:   CN114130210-A
  • 发明人:   DONG P, ZHANG S, TANG X, SUN X, YI X, GAO X, WANG W, XU L, ZHAO K
  • 专利权人:   UNIV TIANJIN POLYTECHNIC
  • 国际专利分类:   B01D067/00, B01D069/02, B01D069/10, B01D069/12
  • 专利详细信息:   CN114130210-A 04 Mar 2022 B01D-067/00 202245 Chinese
  • 申请详细信息:   CN114130210-A CN11398824 24 Nov 2021
  • 优先权号:   CN11398824

▎ 摘  要

NOVELTY - Preparing layer-by-layer self assembled antibacterial hydrogel filter film comprises (a) adding reinforcing agent and sodium alginate to copper ammonia solution, mixing and dissolving, dispersing to obtain mixed aqueous solution A; (b) preparing 0.05-5% cationic polyelectrolyte aqueous solution B having acidic pH; and (c) soaking hydrolyzed surface with carboxyl macromolecule film as base film in mixed aqueous solution B, coating a layer of cationic polyelectrolyte on base film surface, soaking the base film coated with cationic polyelectrolyte in mixed aqueous solution A, self-assembling sodium alginate and cationic polyelectrolyte to form a film, releasing copper ion by copper ammonia solution when meeting acid, crosslinking sodium alginate to generate copper alginate hydrogels, rinsing film, soaking the film in mixed aqueous solution B, coating on base film surface, soaking the film in the mixed aqueous solution A, rinsing the film, and repeating for multiple times. USE - The hydrogel filter film is useful for desalination of dyes and removal of antibiotics (claimed) and sewage treatment. ADVANTAGE - The combined effect of polymer self-assembly and copper ion cross-linking enhances the film stability, and copper ions enabled the film to have good antibacterial properties.